Pressure-recorder.



No. 665,I54. Patented 1an. I, |90I. F. L. WOLFE. 1

PRESSURE. RECORDER.

(Applicaticn lad Kar. 14, 1900.)

(No Model.)

UNITED STATES PATENT Frist;

FRANK L. VVOLFE, OF MEDFORD, MASSACHUSETTS, ASSIGNOR TO THE CROSBY STEAM GAGE AND VALVE COMPANY, OF BOSTON, MASSA- OHUSETTS.

PRESSURE-RECORDER.

SPECIFICATION forming part of Letters Patent No. 665,1 54, dated January l, 1901.

Application tiled March 14, 1900. Serial No. 8,644. die model.)

To MZ whom t may concern:

Be it known that I, FRANK LESLIE WOLFE, a citizen of the United States, and a resident of Medford, in the county of Middlesex and State of Massachusetts, have invented certain ncw and useful Improvements in Pressu 1re-Recorders, (Pen-Lever,) of which the following is a specification.

My invention relates to pressure-recorders, and more particularly to the pen-lever, being an improvement upon my invention described in Letters Patent of the United States dated May 3, i898, No. 603,391; and its object is to provide for the adjustment of the pen-lever to the chart over which it moves. I accomplish this by means of the device illustrated in the accompanying drawings, in which similar letters refer to similar parts throughout.

Figure l represents a recorder in perspective, showing the adjusting device attached to the upright cylinder of the same. Fig. 2 is an enlarged plan view showing the top of the cylinder, the pen-lever as attached to it, the adjusting device, and a section of the chart and its platform. Fig. 3 shows a crosssection ol the pinion which operates the adjusting device.

A is a plate attached to the top of the cylinder D by screws d a. From the outer end of this plate there depends a stud B, within which is arranged the pinion-rod l), surmounted by the pinion b, and terminating at its lower end in the knurled piece b2, employed to turn it.

b3 is a binding-screw adapted to engage the groove b4 of the pinion-rod.

To the top of the plate A is pivotally attached the sector O by the screw c. This sector engages at its gear end c2 the pinion b', and at its other end it is made with a slot d, which straddles the piston-rod F below the ballf. The pen-lever K, which carries the pen 7c, is pivotally attached at one end to the stud L and is actuated by the piston-rod F. The cylinder is attached to the recorder, and the apparatus is inclosed in the recordingcase in the usual manner.

The operation of my device is as follows: The cylinder D is or may be of the general type described in said Letters Patent, having mounted upon it a pen-lever K, adjustably and pivotally fulcrumed at L and actuated by the piston-rod F, which engages it by means of a slot or groove in the ball f running in the direction of the pen-lever. Heretofore it has been necessary to adjust the pen to the chart by moving it to or from the chart with the fingers and then fixing it in place. This method has proved unsatisfactory and difficult, as the adjustment is a very delicate one. By my device the necessary micrometric adjustment is easily obtained. The penlever being properly fulcrumed at L and in engagement with the top ofthe piston-rod, the pen being in place, and the piston-rod being in engagement with the slotted portion of the sector, as explained, I turn the pinionrod by means of the knurled end, and thereby rotate the sector, which carries the pistonrod toward or away from the chart, thereby carrying the pen attached to the outer end of the pen-lever to or away from the chart. When the adjustment is made, the pinionrod may be iixed by means of the bindingscrew b3.

Having described my invention, what I claim, and desire to secure by Letters Patent,

l. In a pressure-recorder the combination; with the cylinder D, )iston-rod F and penlever K mounted on said cylinder and actuated by said piston-rod; of the sector C mounted on said cylinder, and the pinion ZJ/ to engage the gear end of the sector; together with means for rotating the pinion, and means for locking it; substantially as described.

2. In a pressure-recorder the combination with the cylinder D, piston-rod F and penlever K mounted on said cylinder and actuated by said piston-rod; of the sector O mounted on said cylinder, and the pinion b to engage the gear end of the sector; together with means for rotating the pinion; substantially as described.

3. In a pressure-recorder the combination; with a cylinder and a piston-rod and a pen-lever mounted on said cylinder and actuated by said piston-rod; of a sector mounted on said cylinderand having a slot in one end to engage said piston-rod, and a pinion to en- IOO gage the gear end of the sector; together with means for rotating the pinion, and means for locking` it; substantially as described.

4. In a pressure-recorder the combination; with a cylinder and a piston-rod and a penlever mounted on said cylinder and actuated by said piston-rod; of a sector mounted on said cylinder and having a slot in one end to engage said piston-rod, and a pinion to eu gage the gear end of the sector; together with means for rotating the pinion; substantially as described.

5. In a pressure-recorder the combination; with a cylinder and a piston-rod and a penlever mounted on said cylinder and actuated vby said piston-rod; of a lever mounted on said cylinder and having one end adapted to 

